Fountain pen



July 28 1953 1 J. s. zARu l 2,646,777

' FOUNTAIN PEN Filed Dec. ,14, 1951 /n Ven/0r dorf/'e 612a/Wr,

Patented July 28, 1953 Application December 14, 1951, Serial N0. 261,671A v In Mexico December 28, 1950 -1 claim. (C1. 12o-47) The presentinvention relates'to the manufac- Vl'ture of fountain pens Aingeneraland more particularly to novel and useful improvements in su'c'hmanufacture, intended .to provide articles 'of the' class aforesaid,characterized by ygreat .Y simplicityA of construction, a largeink-filling capacity, andsubstantially by the fact thatvtheYillingroperation is eifected through the part of Ythe tube oppositethat which carries the pen 'pint, by means of Va novel, highly efcient,and small suction and discharge pump.

For the purpose of allowing the filling or inkloading.operation of thepen of the invention 'to be effected rapidly and without the .usersstaining his hands, said pen comprises in combination, an ink tube ortank, which carries at one'of its ends the pen point and the pen-hold-`ing part and, at the other end, the ink-loading device;l an outercoverfor said tube or tank; and the usual `cover,` generally provided',withVV a Vfastener or clip for-securing the pen in position in a pocket.c

In* the' present invention, the fillingV of the tube or tank is effectedbythe action ofl a novel pump, that is simultaneously for suction anddischarge and which permits of obtaining a full supply of ink,completely lling all the rtube or tank, even though the ink be at a lowlevel in the ink well.A

Since the tube will generally be made of `trans- 'parent plasticmaterial, the vaction of the pump can be perfectly regulated to suspendsaid action at'the moment the ink completely lls thetube ortankywhichallows -of taking fromtheink the cover for the pen point and thepen-holding part removed.

Fig. 2 is a side elevation of the cover for the pen point and the penholder.

Fig. 3 is likewise a side elevation, in longitudinal section, of thecover for the tube or tank of the pen.

Fig. 4 is a longitudinal sectional elevation of the tube or tank of thefountain pen of the invention, provided at one end with the pen-holdervAs illustrated in the drawings, the

and the pen point amigar the other end, with p the filling device.

Fig. 5 is a detail of Fig. 4, showing more clearly the device for llingthe tube or tank; and

Fig. 6 shows partially in elevation and partially in longitudinalsection the different parts forming the fountain pen proper, namely thepen point, the pen-holder, the tube or tank, and the parts of the devicefor filling said tank.

Before describing in detail the fountain pen of the invention, I wish itto be clearly understood 'that the drawings illustrate only by way ofexample one of the ways of carrying out the invention, without limitingthe latter to the specific details illustrated and described, Whereforin the practice thereof recourse may be had to such variations andmodicationsas be considered or become necessary, without furtherlimitation than the scope of the-appended claim. y

Y fountain pen of the invention comprises a tube or tank YIll, ofanappropriate shape-for example that usually employed, with its ends IIand I2 open,

as is shown more clearly in Fig. 6. At a point g closer'to its end IIthan to its end I2, said tube K vlil-is provided with fastening ring I3and'thread ...ith-the latter serving to secure, by means ofthe `internalthread I8, the outer cover I5, ,which ,forms,hollowgportion-39, which isclosed Vatone .Y of lits ends I6 andopenv at the other-to form *mouthI'l.

Fastening ring I3 is intended to secure cover I9, 'which 'is-providedwith the usual ;1 clip1,20, when Vsaid cover isf mounted upon step 2|ofcoverll5. w

At end II of the tube or tank I0 is provided the pen point 22, which isheld in operating position by pen-holder 23, provided with the splitportion 24 so that the ink may ilow over the writing point of said penpoint. At its other end I2, tube I0 bears the ink-filling device, whichconstitutes the basic feature of the fountain pen of the invention andwhich is constituted by a double-action pump, for suction and discharge,comprised by a tubular piston or stem 25, with one of its ends closedand having flared portion 26, and the other end being provided withthread 21, said piston or stem 25 having perforations 28 and 29 whichconnect the interior of the passage of the widened or flared portion andthe interior `of passage 30 of the stem, with the outside. At the mouthof the flared portion 26 is provided a plug 3I, which retains thereinsmall sphere 32. Plug 3l is formed with channels or passages 33. Saidpiston 25 is introduced through mouth II of tube I0, before adjustingthe pen point 22 and the pen holder small sphere 36, properlydimensioned for obstructing when necessary passage 3l, through whichpassage 30 in stem 25 is extended to the outside. For proper adjustmentof flared portion 26 of stem 25, there is provided on the inner wall ofend I2 of tube l0, a washer or .packingl of rubber or other suitablematerial.

Operation of ink-filling device The device which the present invention-provides for eilecting the inlz-lling operation, as a lsubstantial partof said invention, operatesas follows: After removing outer cover I5from tube or tank I0, said tube lil is` introduced into the ink- Well orother container for the ink to be used,

with pen-point 22 positioned upwardly; in other words, said tube E8 isintroduced into the ink supply 'by its end l2, until part 35 strikes thebottom of the ink container. Pressure is then eX- erted on tube i0 sothat as a result of said pressure and upon overcoming the resistance ofantagonistic spring 34, tubular stem 25 will slide inside hollow portion38 in said tube l E), thus forming a vacuum, which causes the ink to besuctioned up through passage 3l' and toward passage 30, from which itcannot escape because the small sphere 36 acts as a Suction valve,preventing the ink from running out. Upon cessation of the pressure ontube vi il, antagonistic spring 3@ causes piston `or stem 25 to returnto its initial position.

Upon repeating the operation, that is, upon exerting pressure anew ontube 25, the ink which is suctioned anew toward passage 30, forces theink which had been retained therein, to be expelled kthrough orice orperforation 29, toward the inside of hollow portion 38 of tube I0, butbelow -ared portion 26 of stem 25, which has been shifted toward theinside of said hollow portion 38. When the pressure on tube HJ is againreleased and spring 34 forces stem 25 and flared portion 26 to return totheir original position, the

ink which then is already in the lower portion of hollow part 38, flowsthrough orifice 28 toward the inner passage of said flared portion 26and from there, through passages 33, to the ink tank proper, formed byall of hollow portion 38. Constant repetition of the pumping operationaforesaid causes tank 38 of tube I0 to become full of ink, and aspreferably said tube will be made of transparent plastic material, theprogress of the ink-illing operation can be observed, in order to stopthe pumping at the proper moment. The ink which is already in the tankcannot ow out of it, due to the action of small sphere 32 which acts asa suction valve. Y

Having thus described the invention, what I consider as new and desireto secure by Letters Patent is:

A fountain pen comprising a hollow stem forming a reservoir open atopposite ends, with a pen .point at oneend and an ink supply pump at theopposite end, said pump structure comprising a :piston 'head having areduced portion to form a space in the reservoir and formed with acentral chamber with a duct which communicates at one end with thereservoir through openings formed in the head and communicates at itsopposite end with the reservoir through the space formed by the reducedend, .a `check valve vin the chamber, the piston having a stem formedwith an .inlet duct open at its inner endto communicate Vwith thereservoir when the piston is advanced to supply ink, packing in the endof the reservoir to seal the inlet duct when the piston is at rest, `ahollow cap fitted on the free end of the stem, said hollow cap having aninlet opening at itsfree end, ra lcheck valve in vthe hollow cap forclosing the inlet opening, a spring on the stem between the end of thehollow stem and the hollow cap to normally project the reduced end ofthe Apiston against the packing to close the inner end 0f the duct inthe stem, whereby when the end of the hollow cap is held in an inkreceptacle, andthe hollow stem is forced against the tension yof `thespring, ink will 'be 'sucked in the hollow cap, through the duct in thestem to the space 'between the head and 'the reservoir wall and thencethrough the duct in the `rhead, vthe valves Ain the head and in thehollow cap being opened bythe suction created by Vmovement vof thepiston to permit passage of the ink.

JORGE s. ZAR'U'R` lReferences Cited in Vthe le of this patent UNITEDSTATES PATENTS Number Name Date 1,862,586 -Vivian June 141, 19321,908,384 Vivian May 9, 1933 v2,010,950 Hardesty Aug. 13, 1935V2,603,188 McKay July 15, 1952

